TM 10-4520-259-13&P
Table 4-2. Unit Troubleshooting Procedure
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Lethal voltage is present when the water heater is connected to power source.
Disconnect power source before inspecting or repairing any electrical component.
Be careful not to touch electrical connections. Electrical shock and/or death may
result from failure to heed this warning.
WARNING
Exposed fuel and fuel vapor can ignite or explode resulting in severe injury or
death. Observe proper safety precautions when servicing fuel system. Ensure
water heater is cooled down before servicing fuel system.
WARNING
Remove rings, bracelets, wristwatches, and neckchains before working around or
on the water heater. Jewelry can catch on equipment and cause injury, or may
short across an electrical circuit and cause severe burns or electrical shock
4-9
